Department of Obstetrics and Gynecology, NorthShore University HealthSystem, 2650 Ridge Avenue, Evanston, IL 60201, USA.
Int J Biometeorol. 2011 Mar;55(2):265-72. doi: 10.1007/s00484-010-0332-2. Epub 2010 Jun 6.
The aim of this study was to determine whether meteorological factors are associated with the timing of either onset of labor with intact membranes or rupture of membranes prior to labor-together referred to as 'the initiating event' of parturition. All patients delivering at Evanston Hospital after spontaneous labor or rupture of membranes at ≥20 weeks of gestation over a 6-month period were studied. Logistic regression models of the initiating event of parturition using clinical variables (maternal age, gestational age, parity, multiple gestation and intrauterine infection) with and without the addition of meteorological variables (barometric pressure, temperature and humidity) were compared. A total of 1,088 patients met the inclusion criteria. Gestational age, multiple gestation and chorioamnionitis were associated with timing of initiation of parturition (P < 0.01). The addition of meteorological to clinical variables generated a statistically significant improvement in prediction of the initiating event; however, the magnitude of this improvement was small (less than 2% difference in receiver-operating characteristic score). These observations held regardless of parity, fetal number and gestational age. Meteorological factors are associated with the timing of parturition, but the magnitude of this association is small.
本研究旨在确定气象因素是否与胎膜完整的分娩起始或胎膜早破与分娩起始-统称为“分娩起始事件”之间的时间有关。在 6 个月的时间内，研究了在 Evanston 医院自发分娩或胎膜早破后 20 周以上分娩的所有患者。使用临床变量（母亲年龄、胎龄、产次、多胎妊娠和宫内感染）以及添加气象变量（气压、温度和湿度）的逻辑回归模型比较了分娩起始事件。共有 1088 名患者符合纳入标准。胎龄、多胎妊娠和绒毛膜羊膜炎与分娩起始时间有关（P < 0.01）。气象因素与临床因素的结合显著提高了对起始事件的预测能力；然而，这种改善的幅度很小（在接收者操作特征评分中差异小于 2%）。无论产次、胎儿数量和胎龄如何，这些观察结果都是一致的。气象因素与分娩时间有关，但这种关联的幅度很小。
